:root {
  --bg-dark: #0a0e17;
  --card-bg: #111827;
  --card-border: #1f2937;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-amber: #f59e0b;
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Inter', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
}

.top-nav {
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pulse-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
  100% { transform: scale(0.95); opacity: 1; }
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge.live {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-family: var(--font-mono);
}

.lang-switcher {
  display: flex;
  gap: 0.25rem;
  background: #1f2937;
  padding: 0.2rem;
  border-radius: 6px;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  cursor: pointer;
  border-radius: 4px;
  font-weight: 600;
}

.lang-btn.active {
  background: var(--accent-cyan);
  color: #000;
}

.main-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.hero-section {
  text-align: center;
  margin-bottom: 2.5rem;
}

.hero-section h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.hero-subtitle {
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 2rem auto;
  font-size: 1.05rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.metric-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 1.25rem;
  border-radius: 10px;
  text-align: left;
}

.metric-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.metric-value.highlight {
  color: var(--accent-cyan);
}

.metric-value.profit {
  color: var(--accent-emerald);
}

.calculator-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1.75rem;
  margin-bottom: 2.5rem;
}

.calc-header {
  margin-bottom: 1.25rem;
}

.calc-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
}

.calc-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.calc-body {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  align-items: flex-end;
}

.calc-input-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.input-with-symbol {
  display: flex;
  align-items: center;
  background: #0f172a;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  padding: 0 0.75rem;
}

.input-with-symbol span {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

input, select {
  width: 100%;
  background: #0f172a;
  border: 1px solid var(--card-border);
  color: var(--text-main);
  padding: 0.6rem 0.75rem;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  outline: none;
}

.input-with-symbol input {
  border: none;
  background: transparent;
}

.calc-results {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  background: rgba(15, 23, 42, 0.6);
  padding: 1.25rem;
  border-radius: 8px;
  border: 1px solid rgba(31, 41, 55, 0.8);
  margin-top: 0.5rem;
}

.res-box {
  display: flex;
  flex-direction: column;
}

.res-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.res-val {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
}

.table-section {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
}

.table-controls {
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--card-border);
}

.tab-group {
  display: flex;
  gap: 0.5rem;
}

.tab-btn {
  background: #1f2937;
  color: var(--text-muted);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.tab-btn.active {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.4);
}

.search-box input {
  width: 260px;
}

.table-responsive {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.data-table th {
  background: #0f172a;
  color: var(--text-muted);
  padding: 0.9rem 1.25rem;
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--card-border);
}

.data-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(31, 41, 55, 0.6);
  font-family: var(--font-mono);
}

.data-table tr:hover td {
  background: rgba(31, 41, 55, 0.4);
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-right: 0.4rem;
}

.tag.long {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
}

.tag.short {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
}

.tag.exchange {
  background: #1f2937;
  color: #d1d5db;
}

.apr-val {
  font-weight: 700;
}

.apr-val.pos {
  color: var(--accent-emerald);
}

.apr-val.neg {
  color: var(--accent-rose);
}

.footer {
  text-align: center;
  padding: 3rem 1.5rem 4rem;
  border-top: 1px solid var(--card-border);
  margin-top: 4rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}

.footer-links a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover {
  text-decoration: underline;
}

.disclaimer {
  max-width: 800px;
  margin: 0 auto;
  font-size: 0.75rem;
  color: #6b7280;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .hero-section h1 { font-size: 1.75rem; }
  .table-controls { flex-direction: column; align-items: stretch; }
  .tab-group { flex-direction: column; }
  .search-box input { width: 100%; }
}